1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2437c27f5f438e78fe4cb52f280d82888ca78cd48f4b89904244af0f3a4c7c69. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/853ed8f7-52e6-4768-858a-c1babb037636.json and https://artists.proofprofile.net/proofs/artist/853ed8f7-52e6-4768-858a-c1babb037636.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1st Suite for Military Band in E-Flat Major, Op. 28 No. 1, H. 105: I. Chaconne
Holst: Hammersmith, Op. 52, A Moorside Suite & Suites for Military Band, Op. 28
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8e7a2a3cc6658e5d54a5ac86bd82856eb2dfdcf1fcccc6c74851d84d8936d5. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USFKZ0610251.
1st Suite for Military Band in E-Flat Major, Op. 28 No. 1, H. 105: II. Intermezzo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61be5218d9ef49abe23d592883fec0d4e8645f6675cdc3acc13311c26057c206. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USFKZ0610252.
1st Suite for Military Band in E-Flat Major, Op. 28 No. 1, H. 105: III. March
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4adaebc3ca1c3424dcfb9b38c8fe41affa38583de88953af743366a13894c3cb. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USFKZ0610253.
A Moorside Suite, H. 173: I. Scherzo. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05094f60d046cf36a4adeb86ff63567cb95df3beefb7e7eb942da95508c91fe. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USFKZ0610254.
A Moorside Suite, H. 173: II. Nocturne. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f92d60910d8bb0d255274ea05ee4fc950031c787a5df86fb12fd91f4c390880. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USFKZ0610255.
A Moorside Suite, H. 173: III. March. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005246b8ce278ffa4fdebf35a379cba717e47cbf86ef3b3259c05933b181c2e3. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USFKZ0610256.
2nd Suite for Military Band in F Major, Op. 28 No. 2, H. 106: I. March
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32b066c3ff04ceb5a0a7fa53a3f8518728d7ad1ac9b3ed4369f8e14f171a089. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USFKZ0610257.
2nd Suite for Military Band in F Major, Op. 28 No. 2, H. 106: II. Song Without Words
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572a5eccfb86cc708a9ef2c27da786f5b1affe73eefae52a04f243fc18d06bd4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USFKZ0610258.
2nd Suite for Military Band in F Major, Op. 28 No. 2, H. 106: III. Song of the Blacksmith
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bb59fd865c50a8e3f3e023fb27634ea93ca2b3b6d1f18cb4b32f39e0083550. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USFKZ0610259.
2nd Suite for Military Band in F Major, Op. 28 No. 2, H. 106: IV. Fantasia on the Dargason
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab2243dab5ae0292dc02dfb4148b9e523a69feb47870f46a2e34281b2a9f829. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USFKZ0610260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c43637914c40965f48e071bf57e67ca92a8e2120bce8f06a95acd2b950f018. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USFKZ0610261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b4cf84e8a2909b9f4780bad8cc7a98ecad8324895d781cea377660af51d695. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USFKZ0610232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655cc3c682b2dde71969fea8f8516bf481f95fe295ebdd9bcc23da2434fd14f5. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USFKZ0610235.